Having two types of Electric Pile Driver need showing to you. One is GSH-30E, which voltage is 230V, Max.current is 9A, Max.power is 2000W, frequency is 50-60hz, no-load speed is 12/6 r/min, Max.toque is 3600 N.m and main body weight is 37.48kg and it can install 76x1800mm of Ground Screws and smaller. Another is GSH-50E, which voltage is 230V, Max.current is 18A, Max.power is 4000W, frequency is 50-60HZ, no load speed is 11/5 R/min, Max. Torque is 4800N.m and main body weight is 59.52kg and it can install 114x2500mm of Ground Screw Piles. Both electric Pile Driver are very high quality and exquisite.
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1. Add base fertilizer. Mainly organic fertilizer, supplemented by inorganic fertilizer. The application amount of base fertilizer accounts for more than 80% of the total fertilization amount. According to the output of sweet potato of 667 square meters (1 mu), it is 2500-3500 kg, and the base fertilizer should be 3000-4000 kg, and the three-element compound fertilizer 50 kg. Organic fertilizers mainly include soil fertilizers, manure fertilizers, human and animal manure. They are all kinds of complete fertilizers. They are gradually decomposed after application and continue to exert fertilizer efficiency. They are very suitable for the long growing period of sweet potato, but they require full maturity. Therefore, farmers say: sweet potato On the next year, the feces. The application method is stratified and phased application, that is, 1/2 of each of the ploughing and ridges, the crude fertilizer is used as the base, the fertilizer is applied to the surface, and the combination of depth and light can effectively meet the needs of the nutrient of the sweet potato before, during and after the period. Promote the normal growth of sweet potatoes.
2. Reasonable topdressing. Early application of seedling fertilizer, strong seedling fertilizer, generally 3 to 4 days to 30 days after planting, pouring thin human excrement 2 times, each time according to the seedlings per 667 square meters plus urea 1 ~ 3 kg. Re-application Potato fertilizer and long potato fertilizer generally account for 20% of the total fertilization amount. The time is about 50 days after planting. The side of the ridge is ground and fertilized, also called the edge fertilizer. It is also possible to apply crack fertilizer in time when the sweet potato ridge is back cracked, and generally apply manure and manure with appropriate amount of ammonium bicarbonate.
Huaxian County Fertilizer Station Yue Xiuli 
The roots of sweet potato are deep and wide, and the stems can root in the habitat. The fertility is very strong, drought-tolerant and tolerant, and the requirements for nitrogen, phosphorus and potassium are different. They should not be replaced by each other. It should be based on local soil conditions and climate. The status and characteristics of different varieties of sweet potato growth, rational application of fertilizer, only master the principle of "pre-promotion, central control, late prevention and premature aging", in order to achieve the best yield increase.
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